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M35 Stagea Replacement Radiator

Mattl2

By Mattl2,
in Wagoneers

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zei20l Grand Master

zei20l

Posted
Posted

craig is having no problems with his china cheap-ass radiator, so i will have similar results.

i have a nismo thermostat in my car too. however i bet the ebay guy rorted me as nothing really changed on my car in operating temps........

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PN-Mad Grand Master

PN-Mad

Posted
Posted

I don't know the theory behind thermostats. Sure, a nismo one opens earlier, but how can that have any effect on the overall temp of the system when running hot? An open thermostat is an open thermostat.

Sure, more coolant is better, but if it's not cooling in the radiator, then it's just a matter of time till you have twice as much coolant at a hot temp to cool down, which is twice as hard!

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iamhe77 Grand Master

iamhe77

Posted
Posted

I don't know the theory behind thermostats. Sure, a nismo one opens earlier, but how can that have any effect on the overall temp of the system when running hot? An open thermostat is an open thermostat.

Sure, more coolant is better, but if it's not cooling in the radiator, then it's just a matter of time till you have twice as much coolant at a hot temp to cool down, which is twice as hard!

Not so much about cooling from a certain temp, but if you have a thermostat that opens earlier, then it is easier for the cooling system to maintain the lower temp as opposed to one that opens 10 degrees higher which has to work harder to bring the temps back down that extra 10 degrees.

Similar, but reversed, to boiling water - much easier and quicker to bring hot water to the boil than cold water

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HER_M35 Enthusiast

HER_M35

Posted
Posted

Not so much about cooling from a certain temp, but if you have a thermostat that opens earlier, then it is easier for the cooling system to maintain the lower temp as opposed to one that opens 10 degrees higher which has to work harder to bring the temps back down that extra 10 degrees.

Similar, but reversed, to boiling water - much easier and quicker to bring hot water to the boil than cold water

My understanding is that a thermostat that opens earlier will ensure the car takes longer to reach operating temperature, thereby running richer for longer.

It's a bit of a trade off really, it would be better on long hot drives but if you do lots of short runs your fuel economy will most likely go out the window.

I could be wrong, it's happened once before.... whistling.gif

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  • 1 month later...
ArdentEagle Contributor

ArdentEagle

Posted
Posted

Just a quick thread bump.

I've just had my top tank go on my radiator. Are there any direct swaps readily available? I need to get my car fixed fairly quickly so I was hoping to buy local here in W.A.

If not, is this a straight swap? http://www.ebay.com.au/itm/RADIATOR-NISSAN-SKYLINE-V35-AUTO-MANUAL-2001-2007-KOYO-BRAND-NEW-/220872242160?pt=AU_Car_Parts_Accessories&hash=item336d02f3f0#ht_1906wt_1163

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bigkevracer Grand Master

bigkevracer

Posted
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Pretty sure thats what Jase has in his, and it required a fair bit of cutting to fit.

Heard that about the 2.5L versions Iain, but are the cores the same size?

BTW what's this 'ours' buddy? :nyaanyaa: Already looking at upgrading to a PM35?

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jasevr4 Mentor

jasevr4

Posted
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Pretty sure thats what Jase has in his, and it required a fair bit of cutting to fit.

I have the full alloy Koyo 36mm radiator. Needed a bit of trimming here and there but nothing that I'd consider major.

Absolute max I've seen is 108deg on a 40deg day, stuck in traffic for about 10 minutes. Pretty rare to go over 102deg, only ever happens on a hot day after I give it some and then get caught at lights or something. Usually when I check the Informeter it it's sitting around 93-98deg.

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  • 5 years later...
Akshunhiro Rising Star

Akshunhiro

Posted
Posted

Hi all, 

Sorry to bump an old thread but I'm needing a replacement after splitting the top tank. Are these eBay radiators okay? I haven't been able to find a genuine Koyo in Australia other than JustJap but they only have the S2. 

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West Grand Master

West

Posted
Posted
14 hours ago, Akshunhiro said:

Hi all, 

Sorry to bump an old thread but I'm needing a replacement after splitting the top tank. Are these eBay radiators okay? I haven't been able to find a genuine Koyo in Australia other than JustJap but they only have the S2. 

Contact Scotty at Scotty Customs or Fernix radiator. 

I believe Scotty help them developed a direct replacement for the M35 and not just direct fit but it's thicker too. I have one in my car.

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Akshunhiro Rising Star

Akshunhiro

Posted
Posted

Yeah although they still had the VQ25 in S2. Apparently VQ25 S1 and VQ30 are same radiator (with the mounting points on the outer-most edges), slightly different to VQ35 and S2 VQ25 (ditched the viscous fan for electric).

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  • 1 month later...
Akshunhiro Rising Star

Akshunhiro

Posted
Posted

So, still haven't sorted this yet haha. Probably organising to get one through my local Natrad since they can get Koyo's.

I have 2 questions though. My stock radiator is only 16mm thick. I was probably gonna go up to 26mm but will this affect clearance for A/C condensor and A/C fan? I've got room at the back with the shroud and clutch fan but slightly concerned about the front even though it may only be about 5mm difference (if they keep the core centred).

And, was probably going to get some silicone radiator hoses, are 350Z/VQ35DE the same? It looks like they are but just wanted confirmation.

I've got the coolant bypass mod from Scotty so just trying to piece everything together ready to go all at once.

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West Grand Master

West

Posted
Posted
On 5/6/2017 at 3:42 PM, Akshunhiro said:

So, still haven't sorted this yet haha. Probably organising to get one through my local Natrad since they can get Koyo's.

I have 2 questions though. My stock radiator is only 16mm thick. I was probably gonna go up to 26mm but will this affect clearance for A/C condensor and A/C fan? I've got room at the back with the shroud and clutch fan but slightly concerned about the front even though it may only be about 5mm difference (if they keep the core centred).

And, was probably going to get some silicone radiator hoses, are 350Z/VQ35DE the same? It looks like they are but just wanted confirmation.

I've got the coolant bypass mod from Scotty so just trying to piece everything together ready to go all at once.

Pretty sure the one from Fernix are 26mm and we don't have any issues with clearance.

 

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Akshunhiro Rising Star

Akshunhiro

Posted
Posted

Yeah Scotty referred me to Fenix as well but I'm being stubborn and doubting fitment due to core width. Fenix NZ lists what appears to be more suitable for S1: http://www.fenixautoparts.co.nz/index.php?route=product/product&product_id=693

I took mine out on the weekend but hadn't measured it up yet. Was just going to try get a Koyo through Natrad.

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